Question

i have this code:

extern "C" __declspec(dllexport) void getName(void)
{
    char buf[20];
    int slotNumber = 1;

    DWORD tempdw;
    DWORD hStorm_LOBBYPTR;
    hStorm_LOBBYPTR = (DWORD)GetModuleHandleW(L"Storm.dll") + 0x1000 + 0x40000 + 0x8000;


   __asm
    {
     PUSHAD
     MOV        EAX, DWORD PTR DS:[hStorm_LOBBYPTR]
     TEST       EAX, EAX
     JE         nick_false
     MOV        ECX, DWORD PTR DS:[EAX+0xC464]
     TEST       ECX, ECX
     JE         nick_false
     MOV        EAX, DWORD PTR DS:[ECX+0x170+0xB0]
     TEST       EAX, EAX
     JE         nick_false
     MOV        EDX, slotNumber
     MOV        ECX, DWORD PTR DS:[EAX+EDX*4]
     MOV        EAX, DWORD PTR DS:[ECX+0x1A0]
     MOV        ECX, DWORD PTR DS:[EAX+0x1E4]
     MOV        EAX, DWORD PTR DS:[ECX+0x1E4]
     MOV        ECX, DWORD PTR DS:[EAX+0x1E8]
     MOV        tempdw, ECX
     POPAD
     JMP        nick_true

nick_false:
     XOR        EAX, EAX
     MOV        tempdw, EAX
     POPAD
    }

    sprintf(buf,"%d", tempdw);
    MessageBox(0, buf, "Dll Injector", MB_ICONEXCLAMATION | MB_OK);

tempdw is a pointer, but when I try to look at it,
I have this kind of garbage in MessageBox:

What should I do?

Answer 1

My guess is that your assembly stomps over something (possibly a register) which means that the sprintf fails and the buffer just contains random stack noise.

Check this out by removing the assembly.